[Users] Examples of GeoExt

[Christian Mayer]

On 15.06.2018 15:06, Jakob Miksch wrote:
> Thanks for the link. I am actually getting started with Ext JS and
> GeoExt at the same time. (maybe this is a bad idea ... ).
> Understanding the BasiGX components is still a bit unclear to me. And
> the web apps I mentioned earlier are very complex and hence also hard
> to understand.
>
> The examples on http://geoext.org/ are nice and easy to understand,
> but I find it challenging to convert the single file into the proper
> folder structure of Ext.

you are right, that there are not so many example apps available, which
use the MVC / MVVM pattern. Most of the examples are simple single-file
demo-apps (like on the GeoExt website). Maybe a simple MVC / MVVM app
would be cool and we had that for previous GeoExt versions:

https://github.com/geoext/geoext2/tree/master/examples/app/simple

https://github.com/geoext/geoext2/tree/master/examples/app-mvvm


>
> At the moment I am trying to build a pretty standard web mapping
> application with a main map, an overview map and a layer switcher. The
> overview map works, but I struggle to build the layer switcher,
> because I do not figure out how to access the layers from map. This is
> what I did so far: https://github.com/JakobMiksch/HelloGeoExt

Maybe we can use your "HelloWorld" app as example reference for MVC /
MVVM app setup.

>
> Not sure if this is a general Ext question:
> But what is the "best practice" way to exchange the map and its layers
> between the different components?


You can pass in the map or better a MapComponent, like
https://github.com/JakobMiksch/HelloGeoExt/blob/master/app/view/main/Map.js,
as config property of your own component. ExtJS will handle it like a
member variable in your instance.
If that is not possible for your whatever reason you can query arbitrary
component instances with Ext.ComponentQuery.query
(https://geoext.github.io/geoext3/master/docs-w-ext/#!/api/Ext.ComponentQuery).
So a

Ext.ComponentQuery.query('mappanel')

might be a helpful command. Even I like it more to pass over
dependencies as config.

Cheers
Chris

>
> Is there any rather simple GeoExt based app that I could use a template?
>
> Cheers and have a nice weekend,
> Jakob
>
> Am 13.06.2018 um 10:30 schrieb Seth G:
>> Hi Jakob,
>>
>> https://github.com/terrestris/BasiGX has a good collcetion of tools and utilities. 
>>
>> Seth
>>
>> --
>> web:http://geographika.co.uk
>> twitter: @geographika
>>
>> On Wed, Jun 13, 2018, at 9:39 AM, Jakob Miksch wrote:
>>> Dear list,
>>>
>>> I am getting into Ext and GeoExt and I am looking for examples where I 
>>> could learn from. I already found these:
>>>
>>> https://github.com/terrestris/shogun2-client
>>> https://github.com/OpenBfS/gis-client
>>>
>>> and of course the tutorials:
>>> https://github.com/geoext/geoext3-ws
>>> https://github.com/geoext/geoext3/blob/master/universal-app.md
>>>
>>> Could you point me to any other existing projects with GeoExt?
>>>
>>> kind regards,
>>> Jakob
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>
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